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drivers: net: cpsw: enable promiscuous mode support

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Enable promiscuous mode support for CPSW.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mugunthan V N 2014-01-23 00:03:12 +05:30 committed by David S. Miller
parent 6ef7b8a23a
commit 0cd8f9cc06
3 changed files with 98 additions and 25 deletions
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105
drivers/net/ethernet/ti/cpsw.c
View file

@ -541,14 +541,93 @@ static inline int cpsw_get_slave_port(struct cpsw_priv *priv, u32 slave_num)
return slave_num;
}
static void cpsw_set_promiscious(struct net_device *ndev, bool enable)
{
struct cpsw_priv *priv = netdev_priv(ndev);
struct cpsw_ale *ale = priv->ale;
int i;
if (priv->data.dual_emac) {
bool flag = false;
/* Enabling promiscuous mode for one interface will be
* common for both the interface as the interface shares
* the same hardware resource.
*/
for (i = 0; i <= priv->data.slaves; i++)
if (priv->slaves[i].ndev->flags & IFF_PROMISC)
flag = true;
if (!enable && flag) {
enable = true;
dev_err(&ndev->dev, "promiscuity not disabled as the other interface is still in promiscuity mode\n");
}
if (enable) {
/* Enable Bypass */
cpsw_ale_control_set(ale, 0, ALE_BYPASS, 1);
dev_dbg(&ndev->dev, "promiscuity enabled\n");
} else {
/* Disable Bypass */
cpsw_ale_control_set(ale, 0, ALE_BYPASS, 0);
dev_dbg(&ndev->dev, "promiscuity disabled\n");
}
} else {
if (enable) {
unsigned long timeout = jiffies + HZ;
/* Disable Learn for all ports */
for (i = 0; i <= priv->data.slaves; i++) {
cpsw_ale_control_set(ale, i,
ALE_PORT_NOLEARN, 1);
cpsw_ale_control_set(ale, i,
ALE_PORT_NO_SA_UPDATE, 1);
}
/* Clear All Untouched entries */
cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
do {
cpu_relax();
if (cpsw_ale_control_get(ale, 0, ALE_AGEOUT))
break;
} while (time_after(timeout, jiffies));
cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
/* Clear all mcast from ALE */
cpsw_ale_flush_multicast(ale, ALE_ALL_PORTS <<
priv->host_port);
/* Flood All Unicast Packets to Host port */
cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 1);
dev_dbg(&ndev->dev, "promiscuity enabled\n");
} else {
/* Flood All Unicast Packets to Host port */
cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 0);
/* Enable Learn for all ports */
for (i = 0; i <= priv->data.slaves; i++) {
cpsw_ale_control_set(ale, i,
ALE_PORT_NOLEARN, 0);
cpsw_ale_control_set(ale, i,
ALE_PORT_NO_SA_UPDATE, 0);
}
dev_dbg(&ndev->dev, "promiscuity disabled\n");
}
}
}
static void cpsw_ndo_set_rx_mode(struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
if (ndev->flags & IFF_PROMISC) {
/* Enable promiscuous mode */
dev_err(priv->dev, "Ignoring Promiscuous mode\n");
cpsw_set_promiscious(ndev, true);
return;
} else {
/* Disable promiscuous mode */
cpsw_set_promiscious(ndev, false);
}
/* Clear all mcast from ALE */
@ -1257,29 +1336,6 @@ static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
return NETDEV_TX_BUSY;
}
static void cpsw_ndo_change_rx_flags(struct net_device *ndev, int flags)
{
/*
* The switch cannot operate in promiscuous mode without substantial
* headache. For promiscuous mode to work, we would need to put the
* ALE in bypass mode and route all traffic to the host port.
* Subsequently, the host will need to operate as a "bridge", learn,
* and flood as needed. For now, we simply complain here and
* do nothing about it :-)
*/
if ((flags & IFF_PROMISC) && (ndev->flags & IFF_PROMISC))
dev_err(&ndev->dev, "promiscuity ignored!\n");
/*
* The switch cannot filter multicast traffic unless it is configured
* in "VLAN Aware" mode. Unfortunately, VLAN awareness requires a
* whole bunch of additional logic that this driver does not implement
* at present.
*/
if ((flags & IFF_ALLMULTI) && !(ndev->flags & IFF_ALLMULTI))
dev_err(&ndev->dev, "multicast traffic cannot be filtered!\n");
}
#ifdef CONFIG_TI_CPTS
static void cpsw_hwtstamp_v1(struct cpsw_priv *priv)
@ -1575,7 +1631,6 @@ static const struct net_device_ops cpsw_netdev_ops = {
.ndo_open = cpsw_ndo_open,
.ndo_stop = cpsw_ndo_stop,
.ndo_start_xmit = cpsw_ndo_start_xmit,
.ndo_change_rx_flags = cpsw_ndo_change_rx_flags,
.ndo_set_mac_address = cpsw_ndo_set_mac_address,
.ndo_do_ioctl = cpsw_ndo_ioctl,
.ndo_validate_addr = eth_validate_addr,

16
drivers/net/ethernet/ti/cpsw_ale.c
View file

@ -477,6 +477,14 @@ static const struct ale_control_info ale_controls[ALE_NUM_CONTROLS] = {
.port_shift = 0,
.bits = 1,
},
[ALE_P0_UNI_FLOOD] = {
.name = "port0_unicast_flood",
.offset = ALE_CONTROL,
.port_offset = 0,
.shift = 8,
.port_shift = 0,
.bits = 1,
},
[ALE_VLAN_NOLEARN] = {
.name = "vlan_nolearn",
.offset = ALE_CONTROL,
@ -573,6 +581,14 @@ static const struct ale_control_info ale_controls[ALE_NUM_CONTROLS] = {
.port_shift = 0,
.bits = 1,
},
[ALE_PORT_NO_SA_UPDATE] = {
.name = "no_source_update",
.offset = ALE_PORTCTL,
.port_offset = 4,
.shift = 5,
.port_shift = 0,
.bits = 1,
},
[ALE_PORT_MCAST_LIMIT] = {
.name = "mcast_limit",
.offset = ALE_PORTCTL,

2
drivers/net/ethernet/ti/cpsw_ale.h
View file

@ -34,6 +34,7 @@ enum cpsw_ale_control {
ALE_ENABLE,
ALE_CLEAR,
ALE_AGEOUT,
ALE_P0_UNI_FLOOD,
ALE_VLAN_NOLEARN,
ALE_NO_PORT_VLAN,
ALE_OUI_DENY,
@ -47,6 +48,7 @@ enum cpsw_ale_control {
ALE_PORT_DROP_UNTAGGED,
ALE_PORT_DROP_UNKNOWN_VLAN,
ALE_PORT_NOLEARN,
ALE_PORT_NO_SA_UPDATE,
ALE_PORT_UNKNOWN_VLAN_MEMBER,
ALE_PORT_UNKNOWN_MCAST_FLOOD,
ALE_PORT_UNKNOWN_REG_MCAST_FLOOD,